This could've been pretty cool...
The hockey mask thing at the end was really cliche... Why do killers love to wear hockey masks? Why aren't they more original?
But seriously folks... This probably could've been cooler with more dialog. It just seemed very pointless. It's like saying, "Hey... Here's a killing!" And then after you show it, you just stare at the person... Blinking and not saying anything about it... Leaving an awkward silence as you stare at each other... Then the person you showed it to thinks you're dumb, and he walks away and gets an icecream sandwich... Mmm... Icecream sandwiches...